Abstract
Surface-enhanced Raman scattering (SERS) has been used to investigate surface segregation in blends of high molecular weight polystyrene (PS) and deuterated polystyrene (DPS) (both having molecular weight 1 950 000) following annealing at temperatures above the upper critical solution temperature (UCST). Before annealing, the composition of the surface regions of the blends was similar to that of the bulk; after annealing, DPS segregated to the surface and the extent of surface segregation was related to the amount of DPS in the blends
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